Arid
DOI10.1007/s00442-017-4038-6
Reproductive ecology of a parasitic plant differs by host species: vector interactions and the maintenance of host races
Yule, Kelsey M.; Bronstein, Judith L.
通讯作者Yule, Kelsey M.
来源期刊OECOLOGIA
ISSN0029-8549
EISSN1432-1939
出版年2018
卷号186期号:2页码:471-482
英文摘要

Parasitic plants often attack multiple host species with unique defenses, physiology, and ecology. Reproductive phenology and vectors of parasitic plant genes (pollinators and dispersers) can contribute to or erode reproductive isolation of populations infecting different host species. We asked whether desert mistletoe, Phoradendron californicum (Santalaceae tribe Visceae syn. Viscaceae), differs ecologically across its dominant leguminous hosts in ways affecting reproductive isolation. Parasite flowering phenology on one host species (velvet mesquite, Prosopis velutina) differed significantly from that on four others, and phenology was not predicted by host species phenology or host individual. Comparing mistletoe populations on mesquite and another common host species (catclaw acacia, Senegalia greggii) for which genetically distinct host races are known, we tested for differences in interactions with vectors by quantifying pollinator visitation, reward production, pollen receipt, and fruit consumption. Mistletoes on mesquite produced more pollinator rewards per flower (1.86 times the nectar and 1.92 times the pollen) and received similar to 2 more pollen grains per flower than those on acacia. Mistletoes on the two host species interacted with distinct but overlapping pollinator communities, and pollinator taxa differed in visitation according to host species. Yet, mistletoes of neither host showed uniformly greater reproductive success. Fruit set (0.70) did not differ by host, and the rates of fruit ripening and removal differed in contrasting ways. Altogether, we estimate strong but asymmetric pre-zygotic isolating barriers between mistletoes on the two hosts. These host-associated differences in reproduction have implications for interactions with mutualist vectors and population genetic structure.


英文关键词Phenology Pollination Mistletoe Reproductive isolation Seed dispersal
类型Article
语种英语
国家USA
收录类别SCI-E
WOS记录号WOS:000424210100016
WOS关键词PHORADENDRON-CALIFORNICUM VISCACEAE ; ZEALAND MISTLETOES LORANTHACEAE ; SYMPATRIC SPECIATION ; DESERT MISTLETOE ; SEED DISPERSAL ; GENETIC RACES ; DIFFERENTIATION ; INSECTS ; SYNCHRONIZATION ; TRANSMISSION
WOS类目Ecology
WOS研究方向Environmental Sciences & Ecology
来源机构University of Arizona
资源类型期刊论文
条目标识符http://119.78.100.177/qdio/handle/2XILL650/211870
作者单位Univ Arizona, Dept Ecol & Evolutionary Biol, 1041 E Lowell St, Tucson, AZ 85721 USA
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GB/T 7714
Yule, Kelsey M.,Bronstein, Judith L.. Reproductive ecology of a parasitic plant differs by host species: vector interactions and the maintenance of host races[J]. University of Arizona,2018,186(2):471-482.
APA Yule, Kelsey M.,&Bronstein, Judith L..(2018).Reproductive ecology of a parasitic plant differs by host species: vector interactions and the maintenance of host races.OECOLOGIA,186(2),471-482.
MLA Yule, Kelsey M.,et al."Reproductive ecology of a parasitic plant differs by host species: vector interactions and the maintenance of host races".OECOLOGIA 186.2(2018):471-482.
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